Dear Andrew, no, this is not done with dynamically connecting jobs. The failing tests use a communicator, which is setup by merging back an intercommunicator (MPI_Intercomm_merge), which was first split from MPI_COMM_WORLD (MPI_Intercomm_create).
Please see tst_comm.c:459 Best regards, Rainer On 11.11.2014, at 23:44, "Friedley, Andrew" <andrew.fried...@intel.com> wrote: > Ralph, > > You're right that PSM wouldn't support dynamically connecting jobs. I don't > think intercomm_create implies that though. For example you could split > COMM_WORLD's group into two groups, then create an intercommunicator across > those two groups. I'm guessing that's what this test is doing, I'd have to > go read the code to be sure though. > > I verified this tests works over PSM and OMPI 1.6.5; it fails on 1.8.1 and > 1.8.3. > > Andrew > >> -----Original Message----- >> From: devel [mailto:devel-boun...@open-mpi.org] On Behalf Of Ralph >> Castain >> Sent: Tuesday, November 11, 2014 2:23 PM >> To: Open MPI Developers >> Subject: Re: [OMPI devel] 1.8.3 and PSM errors >> >> I thought PSM didn’t support dynamic operations such as Intercomm_create >> - yes? The PSM security key wouldn’t match between the two jobs, and so >> there is no way for them to communicate. >> >> Which is why I thought PSM can’t be used for dynamic operations at all, >> including comm_spawn and connect/accept >> >> >>> On Nov 11, 2014, at 2:13 PM, Jeff Squyres (jsquyres) <jsquy...@cisco.com> >> wrote: >>> >>> On Nov 11, 2014, at 4:56 PM, Friedley, Andrew >> <andrew.fried...@intel.com> wrote: >>> >>>> OK, I'm able to reproduce this now, not sure why I couldn't before. I took >> a look at the diff of the PSM MTL from 1.6.5 to 1.8.1, and nothing is >> standing >> out to me. >>>> >>>> Question more for the general group: Did anything related to the >> behavior/usage of MTL add_procs() change in this time window? >>> >>> The time between the 1.6.x series and the 1.8.x series is measure in terms >> of a year or two, so, ya, something might have changed... >>> >>>> More particularly, it looks like add_procs is being called a second time >> during MPI_Intercomm_create and being passed a process that is already >> connected (passed into the first add_procs call). Is that right? Should the >> MTL handle multiple add_procs calls with the same proc provided? >>> >>> I'm afraid I don't know much about the MTL interface. >>> >>> George / Nathan? >>> >>> -- >>> Jeff Squyres >>> jsquy...@cisco.com >>> For corporate legal information go to: >> http://www.cisco.com/web/about/doing_business/legal/cri/ >>> >>> _______________________________________________ >>> devel mailing list >>> de...@open-mpi.org >>> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel >>> Link to this post: http://www.open- >> mpi.org/community/lists/devel/2014/11/16294.php >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel >> Link to this post: http://www.open- >> mpi.org/community/lists/devel/2014/11/16295.php > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2014/11/16296.php --------------------------------------------------------------------- Prof. Dr.-Ing. Rainer Keller Hochschule für Technik Stuttgart Fakultät für Vermessung, Informatik und Mathematik Schellingstr. 24, Raum 2/449 70174 Stuttgart T.: +49 (0)711 8926-2812 F.: +49 (0)711 8926-2553
